Mamoru Takuma kills eight and injures 15 in a mass stabbing at an elementary school in the Osaka Prefecture of Japan.

The Osaka school massacre was a mass murder that occurred at Ikeda Elementary School in Ikeda, Osaka Prefecture, Japan on 8 June 2001, in which Mamoru Takuma, a 37-year-old ex-convict with a history of mentally disturbed and anti-social behavior, stabbed eight students to death and seriously wounded fifteen others in a knife attack that lasted several minutes. Takuma was sentenced to death in August 2003 and executed in September 2004.

Mamoru Takuma (宅間 守, Takuma Mamoru, 23 November 1963 – 14 September 2004) was a Japanese mass murderer who killed eight children in the Osaka school massacre in Ikeda, Osaka Prefecture on 8 June 2001.Takuma had a long history of mentally disturbed and anti-social behavior, and an extensive criminal record including a conviction for rape. He stabbed to death eight students and seriously wounded fifteen others at Ikeda Elementary School in a knife attack that lasted several minutes.

Takuma was convicted in August 2003 and executed on 14 September 2004.